Radiation protection dosimetry最新文献

{"title":"Advancing understanding of temporal performance and behaviour in consumer-grade electronic radon monitors.","authors":"Alexander Lemieux, Sydney Brewer, Pawel Mekarski","doi":"10.1093/rpd/ncag121","DOIUrl":"https://doi.org/10.1093/rpd/ncag121","url":null,"abstract":"<p><p>Consumer-grade electronic radon monitors (ERMs) are becoming increasingly popular, yet evidence of their performance remains largely based on short-term testing of a limited number of devices. This study evaluated nine models of consumer-grade ERMs over a 3-month exposure period in a radon chamber to assess accuracy, precision, stabilization, drift, and temporal behaviour. Absolute mean difference (AMD) improved over time, with all devices achieving <25% AMD after 1 month. Detector technology was the primary determinant of temporal performance. Ionization chamber-based devices stabilized within 24 h but exhibited a slight positive bias, whereas photodiode-based devices required several weeks to stabilize yet produced more accurate long-term averages. Time-series analyses indicated that photodiode-based devices exhibited signatures of internal data processing that suppressed short-term variability. Overall, the ERMs evaluated provided reliable integrated measurements over test periods consistent with long-term testing guidance. These findings support the development of performance standards, certification programs, and public guidance.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149224825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calculation of neutron fluence-to-absorbed-dose conversion coefficients using Monte Carlo simulations and a pair of Chinese adult male and female phantoms.","authors":"Kebede Shogile, Meitong Wei, Muhammad Zeeshan, Zirui Ye, Jingnan Guo, Xie George Xu","doi":"10.1093/rpd/ncag082","DOIUrl":"10.1093/rpd/ncag082","url":null,"abstract":"<p><p>For purposes of radiation protection and risk assessment involving neutron exposures, conversion coefficients linking external measurable fields to the organ absorbed dose and effective dose are essential dosimetric data for situations such as space exploration. This study utilized the TOPAS (TOol for PArticle Simulation) Monte Carlo code to calculate neutron fluence-to-absorbed-dose conversion coefficients for a pair of Chinese population-averaged University of Science and Technology of China Adult Male and Female Phantoms. Simulations were performed for mono-energetic neutrons ranging from $1times{10}^{-9}$ MeV to 10 GeV for standard AP, PA, LLAT, RLAT, ROT, and ISO irradiation geometries. To evaluate the impact of anatomical differences between phantoms representing the Chinese and Western populations, results were compared against those calculated for International Commission on Radiological Protection Computational Phantoms. Finally, a neutron source spectrum for the surface of the Moon is used to show how the conversion coefficient can be used for conditions involving the mission to the Moon. The results reveal that for the majority of the organs, the computed neutron fluence-to-absorbed-dose conversion factors are in good agreement. However, profound differences are observed for organs such as the breast, ovaries, and testes. These findings highlight the importance of employing population-specific phantoms for accurate dose estimates in radiation protection and risk management.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1442-1461"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148631410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multi-study analysis of variability in calibration coefficients for radiation dose estimation via the dicentric chromosome assay.","authors":"Morteza Kosarnia, Elham Khakshor, Fatemeh Najafian, Hosein Azimian","doi":"10.1093/rpd/ncag065","DOIUrl":"10.1093/rpd/ncag065","url":null,"abstract":"<p><p>Accurate calibration of biological dosimetry methods is crucial for reliable radiation dose assessment in both medical and research contexts. However, discrepancies in calibration coefficients (α, β, c) across various studies impede standardization and the comparability of dose-response curves. This study conducted a systematic analysis of calibration data from 62 studies covering different radiation types (60Co gamma rays, 137Cs gamma rays, and X-rays) with varying energies and dose rates (0.00196-23.85 Gy/min), to explore the sources of variability and their effects on dicentric chromosome yields. Using descriptive statistics, analysis of variance, Kruskal-Wallis tests, and correlation analyses, we found significant differences in α and β coefficients across different dose rate categories for 60Co gamma rays (P < .05). Specifically, the α coefficient increased from 0.022 ± 0.015 at low dose rates (0-0.5 Gy/min) to 0.049 ± 0.021 at higher dose rates (>1 Gy/min). Moreover, no significant differences were detected between the Computer-Assisted Brain Analysis System (CABAS) and Dose Estimate software for estimating coefficients (P > .05 for α, β, c), indicating consistency in the methodological outputs of these software tools. The observed variability was attributed to factors such as radiation quality, experimental protocols, and inter-laboratory differences. These findings highlight the necessity for standardized calibration protocols that take radiation parameters into account. We propose the development of harmonized experimental setups and reference curves to improve comparability across studies, ultimately enhancing the accuracy of biological dosimetry for radiation protection and epidemiological research. In alignment with existing International Atomic Energy Agency and International Organization for Standardization (ISO) guidelines and acknowledging that international ring-trial intercomparisons remain essential for ensuring comparability across laboratories.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1401-1413"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148579806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"G4DARI: an intuitive graphical interface for Monte Carlo radiation dose calculation using GATE/GEANT4.","authors":"M'hamed Bentourkia","doi":"10.1093/rpd/ncag076","DOIUrl":"10.1093/rpd/ncag076","url":null,"abstract":"<p><p>GEometry ANd Tracking, version 4 (GEANT4) Dose and Radiation Interaction (G4DARI) is a GEANT4 Application for Tomographic Emission (GATE)/GEANT4 built graphical, Windows-based interface designed to facilitate Monte Carlo dose calculations in computed tomography images of patients, small animals, and phantoms. Developed to remove the programming barrier commonly associated with handling image formats and using GATE and GEANT4 coding, G4DARI integrates Oracle virtual machine (VM) VirtualBox for running the simulation environment and PuTTY for secure communication between the VM and the host system. The interface allows users to perform complete Monte Carlo dose simulations using only mouse interactions, providing a streamlined workflow for clinically relevant simulations, preclinical and research applications, and educational purposes. This manuscript describes the architecture, workflow, and features of G4DARI, from the conversion of Digital Imaging and Communications in Medicine (DICOM) images to dose determination in any region of the digital image. Furthermore, G4DARI is freely available for download, providing users with an accessible platform for running their own dosimetry simulations.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1462-1473"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148631440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of abnormal results in personal dose monitoring of radiation workers in Beijing, China from 2021 to 2025.","authors":"Tian Qingxiang, Cui Limeng, Ma Yongzhong, Jiang Wenwen, Bai Bin","doi":"10.1093/rpd/ncag085","DOIUrl":"10.1093/rpd/ncag085","url":null,"abstract":"<p><p>Long-term standardized personal dose monitoring is essential for occupational radiation protection and health risk assessment of radiation workers. This study aimed to analyse the distribution characteristics, major causes, and actual exposure risks of abnormal individual dose monitoring results among radiation workers in Beijing from 2021 to 2025. A 5-year large-sample analysis of abnormal individual dose data among local radiation workers was performed to systematically explore the key problems in daily dose monitoring management. A total of 286 339 person-times of occupational external exposure monitoring (Hp(10)) were included, and 313 records exceeding the quarterly investigation level of 1.25 mSv were selected for retrospective investigation and statistical analysis. The overall 5-year abnormal rate was 0.11%, with no significant annual variation. Most abnormal cases were concentrated in medical institutions, especially in diagnostic radiology and interventional radiology. Non-standard behaviours such as improper placement and irregular wearing of dosemeters were the main causes of false abnormal doses, accounting for the majority of over-threshold records. Only 46 cases were confirmed as actual occupational exposure, and all quarterly doses were below 3 mSv. Interventional radiology personnel had a significantly higher actual exposure fraction than other radiation worker groups, with both the highest proportion of exposed individuals and the largest collective occupational exposure dose. The overall occupational exposure level of radiation workers in Beijing remained under effective control during the study period. In conclusion, inappropriate dosemeter management is the primary factor leading to abnormal monitoring data. Targeted radiation protection training and standardized dose supervision should be strengthened for high-risk groups, especially interventional radiology workers, to improve the authenticity and effectiveness of occupational dose monitoring and optimize regional radiation protection management.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1436-1441"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148606796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiation safety attitude among anesthesiologists in radiation fields.","authors":"Eman A S Sabek, Walid H Nofal","doi":"10.1093/rpd/ncag083","DOIUrl":"10.1093/rpd/ncag083","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to assess anesthetists' knowledge of radiation safety and the frequency with which protective measures are used across different operating theaters.</p><p><strong>Methods: </strong>A total of 110 participants, in a single educational institution, returned completed questionnaires. Their knowledge levels and attitudes were analyzed and correlated with gender, years of experience, and area of assignment.</p><p><strong>Results: </strong>No significant association was found between gender and knowledge level. However, a strong positive correlation (P < .001) was observed between years of experience and total knowledge score. Regarding attitudes, only 24 participants (21.8%) reported using dosimetry, and all of them monitored and followed up on their readings. Concerning apron use, 69 anesthesia physicians (62.7%) reported wearing aprons; however, only 11 (15.9%) routinely inspected them before use. Among the 41 physicians who did not use aprons, only 4 cited unavailability, while ~53.6% reported discomfort as the primary reason. The use of thyroid shields and protective eyewear was reported by only 18.2% and 11.8% of participants, respectively.</p><p><strong>Conclusion: </strong>Owing to the growing number of therapeutic surgical procedures using radiation imaging, regular training in radiation protection is essential. Additionally, operating theaters where radiological procedures are performed should be treated as radiological environments and equipped with appropriate protective measures to ensure the safety of all personnel.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1424-1435"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148606766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of kV-CBCT protocol selection on organ dose in head-and-neck IGRT: an OSLD phantom study.","authors":"Yassine Aguezzoumen, Abdellatif Elanique, Mohammed Reda Mesradi, Mustapha Krim, Oussama Elmouden, Abdellah Hadaoui, Taoufik Kessab, Asmae Saadi, Oualid Warimezgane, Abdelali Oudbib, Fatima Safini, Bouchra Amaoui","doi":"10.1093/rpd/ncag077","DOIUrl":"10.1093/rpd/ncag077","url":null,"abstract":"<p><p>While essential for precision in image-guided radiation therapy (IGRT), kilovoltage (kV) cone beam computed tomography (CBCT) contributes a cumulative radiation dose to organs at risk. This study quantifies absorbed organ doses in head-and-neck IGRT, emphasizing the benefit of optimized anatomy-specific protocols. Using OSLDs in an anthropomorphic phantom, we measured doses for two dedicated head-and-neck protocols (Standard S10/CBCT2 and Low-dose S20/CBCT3). Additionally, a non-optimized chest protocol (CBCT1) was evaluated to quantify the dosimetric penalty of potential protocol misapplication. The misapplied chest protocol resulted in severe overexposure (spinal cord dose $approx $ 81 mGy per scan). In contrast, the optimized head-and-neck protocols maintained organ doses below 20 mGy per scan. Comparing the optimized protocols, the Standard S10 provided a balanced dose profile, while the Low-dose S20 reduced exposure but showed higher variability near bone interfaces. Results show that strict adherence to anatomy-specific protocols is a critical radiation protection imperative to avoid unnecessary exposure.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1393-1400"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148536797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and evaluation of high-density concrete shields using lead and polypropylene fibres for head computed tomography.","authors":"Mohammed K Saeed, Yousif Abdallah, Ibrahim Yahya A Hakeem","doi":"10.1093/rpd/ncag072","DOIUrl":"10.1093/rpd/ncag072","url":null,"abstract":"<p><p>This study developed and evaluated novel high-density concrete shields (HDCS) to protect the radiosensitive ocular lens during head computed tomography (CT). Five formulations with varying polypropylene and lead fibres were tested using anthropomorphic phantoms and clinical patients (n = 35). The lead-free M1 formulation (9.2 kg/m3 polypropylene) was optimal, achieving ~35% reduction in patient ocular lens dose across both CT acquisition protocols. Quantitative American College of Radiology phantom tests confirmed maintained CT number accuracy, uniformity, and spatial resolution. Qualitative radiologist assessment found minimal anterior artefacts that did not affect diagnostic interpretation of central or posterior brain structures. The M1 HDCS is a viable, potentially cost-effective shielding alternative, ideal for routine head CT where orbital detail is not the primary focus.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1365-1376"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148456643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental estimation of extremity doses from handheld XRF devices during radiation exposure incidents.","authors":"M Kowatari, N Kataoka, M Kobayashi, T Tsuji, Y Tanimura","doi":"10.1093/rpd/ncag075","DOIUrl":"10.1093/rpd/ncag075","url":null,"abstract":"<p><p>This study experimentally evaluates extremity doses from unintentional exposure emitted by handheld X-ray fluorescence (XRF) analyzers. Although handheld XRF devices are widely used for material analysis, quantitative assessments of unintentional exposure remain limited. Mockup experiments were conducted using a Thermo Scientific NITON XLt 797 analyzer and a polymethyl methacrylate hand phantom equipped with radiophotoluminescent glass dosemeters (GD-302M). Spectrometric measurements were performed with a CdTe detector, and photon fluence spectra were unfolded using the MAXED code with Particle and Heavy Ion Transport code System-generated response functions. The mean X-ray energy was 28.4 ± 0.03 keV, with characteristic molybdenum peaks at ~17.5 keV (Kα) and 19.6 keV (Kβ). For a typical 30-s analysis, the estimated personal dose equivalent Hp(0.07) at the point of contact was ~95 μSv. The Hp(0.07) on the dorsal side was roughly one-fifth of the palmar dose. Ambient dose equivalent rates measured directly from the XRF device may reach high enough to set radiation-controlled areas, underscoring the need for strict handling protocols. These findings demonstrate the importance of radiological protection education and awareness when using handheld XRF devices.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1414-1423"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148579798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiation hazard indices associated with natural radioactivity in building materials in Montenegro.","authors":"Nevenka M Antović, Tomislav Anđelić","doi":"10.1093/rpd/ncag074","DOIUrl":"10.1093/rpd/ncag074","url":null,"abstract":"<p><p>Eleven building materials (95 samples in total) have been analyzed for 226Ra, 228Ra (232Th series), and 40K activity using High Purity Germanium (HPGe) spectrometry, and concentrations are found to be in the range (2.2-549), (0.3-161), and (2.7-1034) Bq kg-1, respectively. Statistical analyses showed a moderate positive linear correlation between 226Ra and 228Ra, and significant differences in the mean radionuclide concentrations among ceramic tile, brick, granite, and the other studied materials. Radiation hazard indices (radium equivalent activity, external and internal hazard index, activity concentration index, dose rate) were determined to assess the potential health risk. Several samples of granite, ceramic tile, and brick showed individual indices exceeding the recommended maximum values. The discriminant analysis clearly separated granite, brick, and ceramic tile from the other materials, while the principal component analysis showed that the component explaining >84% of the data variance is strongly correlated with loading of 226Ra.</p>","PeriodicalId":20795,"journal":{"name":"Radiation protection dosimetry","volume":" ","pages":"1377-1392"},"PeriodicalIF":0.8,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148536791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}